# Positive Number: Casual Puzzle — Trains your brain in free time

> Trains your brain in free time (iPhone/iPad app by Archi Studio Inc..)

- Source: https://appshunter.io/ios/app/positive-number-casual-puzzle/id1636217458 (this page in markdown: same URL + `.md`)
- Developer: [Archi Studio Inc.](https://appshunter.io/developer/1517180712)
- Category: Games, Education, Casual, Puzzle
- Price: Free with in-app purchases
- Age rating: 17+
- Requires: iOS 11.0 · 126 MB
- Languages: English, Japanese
- Released: 2022-08-09
- Data updated: 2026-06-10
- User reviews in markdown: https://appshunter.io/ios/app/positive-number-casual-puzzle/id1636217458/reviews.md

## What is Positive Number?

"Casual puzzle game that trains your brain in free time" now available!
Over 100 stages! In addition, with the stage creation function, the elements to be played are endless!
You can publish your own stage to the world and play the stage created by other players!

◎ Aim to complete the stage by changing all [Number] to positive numbers!
It is a puzzle game that can be played by anyone who can do addition and multiplication.

■ How to play
When the numbers overlap, these will be reborn as new number according to the set calculation method.
There are two calculation methods, "+" and "x", which can be switched by tapping the lever button.

For example, if the calculation method is "+" and "-1" number and "+1" number overlap, it will be reborn as "± 0" number.
If the calculation method is "x" and "-1" number and "-1" number overlap, it will be reborn as "+1" number.
The stage will be completed by changing all the numbers to positive numbers.

■ Recommended points
・ With the stage creation function, you can upload your own stage to players all over the world!
・ You can also play the stages created by players from all over the world!
・ Over 100 stages can be played from the beginning!
・ Although it is a simple rule, there are many gimmicks, so it's very rewarding!
・ Brain training in your gap time!
・ Anyone who can do addition and multiplication!

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| No ads | $2.99 | one-time |
| Slot unlock 22 | $0.99 | one-time |
| Slot unlock 21 | $0.99 | one-time |
| Slot unlock 23 | $0.99 | one-time |
| Slot unlock 25 | $0.99 | one-time |
| Slot unlock 24 | $0.99 | one-time |
| Slot unlock 26 | $0.99 | one-time |
| Slot unlock 27 | $0.99 | one-time |
| Slot unlock 28 | $0.99 | one-time |
| Slot unlock 29 | $0.99 | one-time |
| Slot unlock 30 | $0.99 | one-time |



## Version history (last 5 releases)

### 1.0.9 — 2024-03-27

･ Partial Functionality Discontinuation
　→Due to the termination of the server services we were using, we have had to discontinue certain functionalities that relied on this server.

### 1.0.7 — 2023-08-06

･ Bug fixed

### 1.0.6 — 2023-08-04

･ Bug fixed

### 1.0.5 — 2023-05-16

･ Bug fixed

### 1.0.4 — 2022-10-16

･ Added a function to narrow down not completed stages in [World] Mode

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## More apps by Archi Studio Inc.

- [Escape Game - Two Choices](https://appshunter.io/ios/app/escape-game-two-choices/id1527040751)
- [FUEMARU SHOOTER](https://appshunter.io/ios/app/fuemaru-shooter/id1553152197)
- [CHU -Simple Shooting](https://appshunter.io/ios/app/chu-simple-shooting/id1597745233)
- [AI Jigsaw Puzzles](https://appshunter.io/ios/app/ai-jigsaw-puzzles/id6445839081)
- [Sort & Merge - Puzzle](https://appshunter.io/ios/app/sort-and-merge-puzzle/id6454837415)

All apps by Archi Studio Inc.: https://appshunter.io/developer/1517180712

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-10.*